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knife edge

noun
1.
the cutting edge of a knife.
2.
anything very sharp.
3.
a wedge on the fine edge of which a scale beam, pendulum, or the like, balances or oscillates.
Origin
1810-1820
1810-20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for knife edge
  • The razor blade was being used as a knife edge in optical measurements.
  • Sick of being permanently on knife edge re pregnancy.
  • When placed together, the bars met at a blunt knife edge and a polished agate plate.
  • Tape casting consists of forming a thin film of ceramic slurry of controlled thickness onto a support surface using a knife edge.
British Dictionary definitions for knife edge

knife edge

noun
1.
the sharp cutting edge of a knife
2.
any sharp edge
3.
a sharp-edged wedge of hard material on which the beam of a balance pivots or about which a pendulum is suspended
4.
a critical point in the development of a situation, process of making a decision, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Value for knife

12
13
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